diff --git a/source b/source
index 24419855ab6..6a7bc611d41 100644
--- a/source
+++ b/source
@@ -56647,7 +56647,7 @@ interface <dfn interface>HTMLButtonElement</dfn> : <span>HTMLElement</span> {
   [<span>HTMLConstructor</span>] constructor();
 
   [<span>CEReactions</span>, <span data-x="xattr-ReflectSetter">ReflectSetter</span>] attribute DOMString <span data-x="dom-button-command">command</span>;
-  [<span>CEReactions</span>, <span data-x="xattr-Reflect">Reflect</span>] attribute Element? <dfn attribute for="HTMLButtonElement" data-x="dom-button-commandForElement">commandForElement</dfn>;
+  [<span>CEReactions</span>, <span data-x="xattr-Reflect">Reflect</span>="<span data-x="attr-button-commandfor">commandfor</span>"] attribute Element? <dfn attribute for="HTMLButtonElement" data-x="dom-button-commandForElement">commandForElement</dfn>;
   [<span>CEReactions</span>, <span data-x="xattr-Reflect">Reflect</span>] attribute boolean <dfn attribute for="HTMLButtonElement" data-x="dom-button-disabled">disabled</dfn>;
   readonly attribute <span>HTMLFormElement</span>? <span data-x="dom-fae-form">form</span>;
   [<span>CEReactions</span>, <span data-x="xattr-ReflectSetter">ReflectSetter</span>] attribute USVString <span data-x="dom-fs-formAction">formAction</span>;
@@ -92988,7 +92988,7 @@ dictionary <dfn dictionary>DragEventInit</dfn> : <span>MouseEventInit</span> {
 
   <span data-x="concept-element-dom">DOM interface</span>:
   <pre><code class="idl">interface mixin <dfn interface>PopoverTargetAttributes</dfn> {
-  [<span>CEReactions</span>, <span data-x="xattr-Reflect">Reflect</span>] attribute Element? <dfn attribute for="HTMLElement" data-x="dom-popoverTargetElement">popoverTargetElement</dfn>;
+  [<span>CEReactions</span>, <span data-x="xattr-Reflect">Reflect</span>="<span data-x="attr-popovertarget">popovertarget</span>"] attribute Element? <dfn attribute for="HTMLElement" data-x="dom-popoverTargetElement">popoverTargetElement</dfn>;
   [<span>CEReactions</span>] attribute DOMString <span data-x="dom-popoverTargetAction">popoverTargetAction</span>;
 };</code></pre>